/*
 *this file is part of nseer erp
 *Copyright (C)2006-2010 Nseer(Beijing) Technology co.LTD/http://www.nseer.com 
 *
 *This program is free software; you can redistribute it and/or
 *modify it under the terms of the GNU General Public License
 *as published by the Free Software Foundation; either
 *version 2 of the License, or (at your option) any later version.
 */
package include.users_lock;

import java.io.*;
import java.util.Map;
import java.util.HashMap;
import javax.servlet.http.*;
import javax.servlet.ServletContext;

public class UserInfo extends java.lang.Object
        implements Serializable, HttpSessionBindingListener {

    private String userName = "";

    public UserInfo(String uName) {
        this.userName = uName;
    }

    public void valueBound(HttpSessionBindingEvent event) {
        HttpSession session = event.getSession();
        ServletContext ctx = session.getServletContext();
        Map map = (Map) ctx.getAttribute("user");
        if (map == null) {
            map = new HashMap();
            ctx.setAttribute("user", map);
        }
        if (!map.containsValue(userName)) {
            map.put(userName, userName);
        }
    }

    public void valueUnbound(HttpSessionBindingEvent event) {
        HttpSession session = event.getSession();
        ServletContext ctx = session.getServletContext();
        Map map = (Map) ctx.getAttribute("user");
        map.remove(userName);
    }
}
